James wolstenholme



(No Model.)

J. WOLSTBNHOLME. Apparatus for Burning Puel. I "Patented NoV. 16 1880.

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APPARATUS FOR BURNING FUEL.

SPECIFICATION forming part of Letters Patent No. 234,&48, dated November 16, 1880.

Application filed July 22, 1880.

To all whom tt may concern:

Be it known that I, JAMES WOLSTENHOLME, a citizen ot' the United States, residing in the city of Bnffalo, in the county of Eric and State of New York, have invented certain new and useful Improvements in Apparatus for Burning Fuel, of which the following is a specification.

My invention relates to certain mechanism whereby a more perfect combustion is provided for; and it consists of one or more airpipes having their inlet-openings in the outer or free air, and connected with a pipe or coil or a series of pipes having their outlet-openings terminate in an opening arranged within the furnace at an angle to the path of the gases, in comhination with a substantially air-tight combustion-chamber, as and t'or purposes which will be more clearly hereinafter shown.

In the accom panyin g drawings, Figure 1 represents a vertical longitudinal section through a steam-boiler, showing a side elevation of my invention as connected thereto. Fig. 2 is a top view ot' a modified form of the coil of pipe, Fig. 3, a plan or top view of a portion ot' Fig. l. Fig. 4 is a Vertical section through the center of a chimney, showinga portion of a chimney and a front view of the pipes as arranged therein, a part of the; upper :portion of the central pipe being in section. Fig. 5 is a vertical central section through a portion ot' a chimney and central tube, and Fig. 6 represents a vertical central section through a modification of my invention.

A represents the chimney, such as is usually employed, in which l arrange one or more tubes, B, having an opening or mouth, G, into which the cold air enters in the direction of the arrows, into the tube or fine B, and from theuce into and down the flue or tube D, where it receives aportion ot' the heat that is usually lost by passing up the chimney, and it then passes into and through a coil, E, surrounding the fire-chamber, in which case the pipe would be connected with the coil in the usual way, and the bell-shaped mouth H, as shown in Fig. 1, would be placed at the point C, shown in Fig. 4. (Sec Figs. 1, 2, and 3, in which Fi 2 represents a modification of the coil, composed ot' straight lengths of pipe F, held to (No model.)

gether by curved elbows made in the usual way.) The air, after it becomes sufficiently heated, issues from a long narrow opening, Gr, in the combustiou or fire chamber, (see Figs. 1, 2, and 3,) which opening is arranged at an angle to the direction ot' the furnace-draft, where it meets the gases from the fire or fuel, and a more perfect combustion takes place. The productsof combustion take the usual course to the chimney through the boiler or other devicc with which my invention may be combined.

I do not contine myself to the prccise arrangement shown, as there may be one or more tubes, B, and in some cases the tubes in the 'chimney may be dispensed with and the coil E may terminate in a fiarin g mouth-piece, H, arranged directly under or near the furnace or boiler, (see Fig. 1,) the object being to have the column of fresh air heated up to as near the temperature of the gases as possible when it issues from the opening G. The induced upward current of air in the tubes B is sufficient to force the more heated air through the various tubes nentioned, while the draft of the chimney assists, as will be readily understood.

My nvention is as well adapted to a stove as to a tubular or other boiler or furnaee.

I sometimes introduce steam as an auXiliary into the air-conductors at a point after the air has become heated to about an even temperature with it,which,becoming mixed with said air, issues from the opening G, as above stated.

My object in placing the head of the columns of air within the chimney with their feet at the bottom or near the ground is to obtain from it without cost the maximum ofheat passing off there. The same is the object of placing the tubes containing the balance of the column under or around the fire-box. Of this, lowever, there is nothing arbitrary. The place, the position, the caliber, and length of the column will vary with the circumstances to which it will have to conform; but it is arbitrary that it shall be always a closely-confined column, having its commencement in the outer air at some convenient point as near the ground as practicable, and having its issue at a point in the furnace in a direction reciprocally across IOO the path of the gases. The form may also be adapted to the circumstances to be nietthe heating to a high but indefinite heat and conveying said heated air to ineet. the unoonbusted infiain m able gases between the furn ace and the object of the fire for the purpose ot' expanding said gases so as to obtain the maxiniuin of their heating power 'or any purpose, and the arrangeinent of the way in which that point is obtained Varying, as it must, with the kind ot' furnace to which it is applied, which furnace may be forned of any suitable inaterial, and receiving its air froni a column having its base in the open air, subject to the cir cunstances of its use, whether it he stationary, steainboat, or other uses, or stoves ot' any kind, and having the issuing-point i'or the hot air, as before specified.

In the modified 'orn shown in Fig. (i, instead of the coil, as shown in Figs. 1 and 3, a cone-shaped case, L, is shown, having its inlet or mouth in the free air outside at M and its issue inside at N, the air passing np through the annular space O and out at N, for the purposes before mentioned. The door J of the furnace should be inade to fit closely without a dainper or opening of any kind,so that no air shall pass in except the heated air through the opening G and that which passes up through the grate K and fuel.

By having the furnacedoor as nearly airtight as practicable, so that no air can get in except that which passes in through the grate and opening Gr, the draft of the chiinncy can act to much better advantage in drawing the fresh heated air through the opening G, and thereby force a strong blast of fresh heated air into the conbustion-chanber at the proper point to produce a more perfect combustion without the aid ot' a blower or any other airt'orcin g device.

I claim as my invention- A t'urnace or other heating device having the usual chimney for producin g the necessary draft, a substatially air-tight door, and the usual open grate for adnitting air to the fuel, in coinbination with a tube or coil having its iulet-opening in the outer air and its outlet end terininate in a long narrow opening, Gr, adapted for conducting the heated air across the path ot' the gases in their course to the chinney, as specified.

JAMES W'OLSTENHOLME. witnesses JAMES SANGSTER, AMos W. SANGSTER. 

